Vikings

 The world of the Vikings is brought to life through the journey of Ragnar Lothbrok, the first Viking to emerge from Norse legend and onto the pages of history - a man on the edge of myth.

Wow. This is a really good show. If you're a fan of Game Of Thrones you will totally love Vikings.
Ragnar and Lagertha are soooo lovable. They're the best. I love them.
This show has already 4 seasons and it's renewed for a fifth one. I enjoyed every episode of it.
Not a waste of time at all. Go give it a try!
Here's a trailer for season one :